10-1 Fossils

• What is a fossil?• Fossils are the preserved remains

or traces of living things • How do fossils form?• Fossils form when organisms die

and are buried in sediment. The sediment hardens into rock and preserves the shape of organisms

What is a Fossil?

• A Fossil is the the preserved remains or traces of living things.

How do fossils form?

How Fossils form.

Types of Fossils: Mold

Example of a Mold

Mold

•A hollow area in sediment in the shape of an organism or part of an organism

Cast

Cast

Cast

•Cast: a solid copy of the shape of an organism.

•This type of fossil is the opposite of a mold.

What do cast and mold fossils have in

common?

•They both preserve details of the organism’s structure.

Petrified Fossils

Petrified Fossils

Petrified Fossils

•Fossils in which minerals have replaced all or part of an organism.

•Example: petrified wood

Carbon Film

•Carbon films are an extremely thin coating of carbon on rock

Carbon Film

Trace Fossils

•Provide evidence of the activities of ancient organisms.

•Example: a fossilized dinosaur footprint

Trace Fossils

Preserved Remains

•Remains that are preserved with little or no change.

•Examples: Animals who died in tar pits, remains of organisms preserved in ice, or amber.

Preserved Remains

Name the type of fossil!!

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